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تسجيل مستخدم جديدJ/$psi$p Scattering Length from GlueX Threshold Measurements
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The quality of the recent GlueX $J/psi $ photoproduction data from Hall~D at Jefferson Laboratory, and the proximity of the data to the energy threshold, gives access to a variety of interesting physics aspects. As an example, an estimation of the $J/psi$-nucleon scattering length $alpha_{J/psi p}$ is provided within the vector meson dominance model. It results in $|alpha_{J/psi p}| = (3.08pm 0.55 ({rm stat.}) pm 0.45 ({rm syst.}))$~mfm.
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84 -
Lubomir Pentchev (Thomas Jefferson National Accelerator Facility
, n Newport News
, Virginia
2020
The $J/psi$-$p$ scattering length, $alpha_{J/psi p}$, can be extracted from the $J/psi$ photoproduction cross section near threshold using the Vector Meson Dominance (VMD) model to relate the reaction $gamma p to J/psi p$ to $J/psi p to J/psi p$. Suc
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